Lecture
Sparse Representation and Applications in Astronomy
Speaker: |
Dr. Jean-Luc
Starck, Service d'Astrophysique CEA/Saclay, France |
Date: |
Friday, 11 May 2007 |
Time: |
11:00-12:30 |
Location: |
"Mediterranean Studies" Seminar Room, FORTH. Heraklion, Crete |
Host: |
P. Tsakalidis |
Abstract: |
Wavelets have been very successfull for many astronomical applications such
as filtering, deconvolution, source detection or compression. Wavelets have
however some limitations when the data present anisotropic features, so we
present other multiscale methods in 2D and in 3D, such the ridgelets or the
curvelets, better adapted to this kind of data. We show how to use these
new 2D and 3D multiscale transforms for various cosmological applications
such the analysis of the spatial distribution of galaxies or the detection
of non-Gaussian signatures in the Cosmic Microwave Background. |
Bio: |
Dr. Jean-Luc Starck, a tenured
researcher at CEA/Saclay France, obtained his PhD from the University
of Nice at Sophia Antipolis, France in 1992. His research has
been revolving on a variety of problems related to signal processing
techniques for astronomical data analysis such as filtering, deconvolution,
compression, and faint source detection. Particular emphasis is
given to novel techniques such as wavelet, ridgelet, curvelet
and non linear multiscale methods. He has published about 100
papers and he is co-author of two textbooks in the area: - "Image and Data Analysis" by J-L. Starck, F. Murtagh and A. Bijaoui, Cambridge Univ. Press, 1998 - "Astronomical Image and Data Analysis", by J-L. Starck and F. Murtagh, Springer 2002 and 2006 Recently he has been applying these techniques to address problems of Observational Cosmology in preparation for the upcoming Plank Space Telescope mission which will be launched by ESA in 2008. For more information visit his personal web page at http://jstarck.free.fr/ |